﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace test_6_17
{
    class Cal2:Call
    {
        public int Mul(int a, int b) { return a * b; }
        public int Div(int a, int b) { 

              return  b != 0 ? a / b : throw new DivideByZeroException();
        }
    }
}
